Warm up the buttermilk. Mix buckwheat flour, oat flakes and 1/2 teaspoon salt. Add buttermilk, lemon juice and yeast to the flour. Mix everything to a smooth dough and let it rise covered in a warm place for one hour.
In the meantime, stir the curd and milk until smooth. Season with salt and pepper. Clean and wash the radishes and cut them into fine sticks. Wash and finely chop the dill. Fold both into the quark. Heat the oil in portions and bake eight large blinis from the dough one after the other and keep warm.
Arrange the blinis with the quark and salmon on a plate. Garnish with dill flowers and lemon.